The newsest generation of Dura-Ace, R9100, brings in yet another chapter of the highest level of race technology driven bike components available to anyone on the planet. The updated C-24 clincher wheelset retains the same carbon/aluminum laminate construction giving you benefits and strengths of each material while the weaknesses of neither. Aluminum brake tracks give superior braking and eliminate the fear of overheating the carbon and having a wheel failure, while the carbon shaping gives the highest level of aerodynamic profile and lightweight responsive performance for quick cornering and lightning quick accelerations.